18580228 has 24 divisors (see below), whose sum is σ = 34659072. Its totient is φ = 8695104.

The previous prime is 18580223. The next prime is 18580267. The reversal of 18580228 is 82208581.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18580193 and 18580202.

It is not an unprimeable number, because it can be changed into a prime (18580223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2176 + ... + 6472.

It is an arithmetic number, because the mean of its divisors is an integer number (1444128).

Almost surely, 2^18580228 is an apocalyptic number.

It is an amenable number.

18580228 is a deficient number, since it is larger than the sum of its proper divisors (16078844).

18580228 is a wasteful number, since it uses less digits than its factorization.

18580228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371 (or 4369 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 18580228 is about 4310.4788597092. The cubic root of 18580228 is about 264.8603892595.

The spelling of 18580228 in words is "eighteen million, five hundred eighty thousand, two hundred twenty-eight".